2 # For a description of the syntax of this configuration file,
3 # see the file Documentation/kbuild/kconfig-language.txt in the
4 # Linux kernel source tree.
6 mainmenu "U-Boot $UBOOTVERSION Configuration"
10 option env="UBOOTVERSION"
12 # Allow defaults in arch-specific code to override any given here
18 string "Local version - append to U-Boot release"
20 Append an extra string to the end of your U-Boot version.
21 This will show up in your boot log, for example.
22 The string you set here will be appended after the contents of
23 any files with a filename matching localversion* in your
24 object and source tree, in that order. Your total string can
25 be a maximum of 64 characters.
27 config LOCALVERSION_AUTO
28 bool "Automatically append version information to the version string"
31 This will try to automatically determine if the current tree is a
32 release tree by looking for Git tags that belong to the current
35 A string of the format -gxxxxxxxx will be added to the localversion
36 if a Git-based tree is found. The string generated by this will be
37 appended after any matching localversion* files, and after the value
38 set in CONFIG_LOCALVERSION.
40 (The actual string used here is the first eight characters produced
41 by running the command:
43 $ git rev-parse --verify HEAD
45 which is done within the script "scripts/setlocalversion".)
47 config CC_OPTIMIZE_FOR_SIZE
48 bool "Optimize for size"
51 Enabling this option will pass "-Os" instead of "-O2" to gcc
52 resulting in a smaller U-Boot image.
54 This option is enabled by default for U-Boot.
56 config DISTRO_DEFAULTS
57 bool "Select defaults suitable for booting general purpose Linux distributions"
58 default y if ARCH_SUNXI
70 Select this to enable various options and commands which are suitable
71 for building u-boot for booting general purpose Linux distributions.
74 bool "Enable malloc() pool before relocation"
77 Before relocation, memory is very limited on many platforms. Still,
78 we can provide a small malloc() pool if needed. Driver model in
79 particular needs this to operate, so that it can allocate the
80 initial serial device and any others that are needed.
82 config SYS_MALLOC_F_LEN
83 hex "Size of malloc() pool before relocation"
84 depends on SYS_MALLOC_F
87 Before relocation, memory is very limited on many platforms. Still,
88 we can provide a small malloc() pool if needed. Driver model in
89 particular needs this to operate, so that it can allocate the
90 initial serial device and any others that are needed.
93 bool "Configure standard U-Boot features (expert users)"
96 This option allows certain base U-Boot options and settings
97 to be disabled or tweaked. This is for specialized
98 environments which can tolerate a "non-standard" U-Boot.
99 Use this only if you really know what you are doing.
102 config SYS_MALLOC_CLEAR_ON_INIT
103 bool "Init with zeros the memory reserved for malloc (slow)"
106 This setting is enabled by default. The reserved malloc
107 memory is initialized with zeros, so first malloc calls
108 will return the pointer to the zeroed memory. But this
111 It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
112 value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
113 Then the boot time can be significantly reduced.
115 When disabling this, please check if malloc calls, maybe
116 should be replaced by calloc - if one expects zeroed memory.
119 bool "Enable debug information for tools"
121 Enable generation of debug information for tools such as mkimage.
122 This can be used for debugging purposes. With debug information
123 it is possible to set breakpoints on particular lines, single-step
124 debug through the source code, etc.
129 bool "64bit physical address support"
131 Say Y here to support 64bit physical memory address.
132 This can be used not only for 64bit SoCs, but also for
133 large physical address extention on 32bit SoCs.
135 endmenu # General setup
147 depends on SUPPORT_SPL
150 If you want to build SPL as well as the normal image, say Y.
152 config SPL_SYS_MALLOC_SIMPLE
155 prompt "Only use malloc_simple functions in the SPL"
157 Say Y here to only use the *_simple malloc functions from
158 malloc_simple.c, rather then using the versions from dlmalloc.c;
159 this will make the SPL binary smaller at the cost of more heap
160 usage as the *_simple malloc functions do not re-use free-ed mem.
164 bool "Enable SDRAM location for SPL stack"
166 SPL starts off execution in SRAM and thus typically has only a small
167 stack available. Since SPL sets up DRAM while in its board_init_f()
168 function, it is possible for the stack to move there before
169 board_init_r() is reached. This option enables a special SDRAM
170 location for the SPL stack. U-Boot SPL switches to this after
171 board_init_f() completes, and before board_init_r() starts.
173 config SPL_STACK_R_ADDR
174 depends on SPL_STACK_R
175 hex "SDRAM location for SPL stack"
177 Specify the address in SDRAM for the SPL stack. This will be set up
178 before board_init_r() is called.
180 config SPL_STACK_R_MALLOC_SIMPLE_LEN
181 depends on SPL_STACK_R && SPL_SYS_MALLOC_SIMPLE
182 hex "Size of malloc_simple heap after switching to DRAM SPL stack"
185 Specify the amount of the stack to use as memory pool for
186 malloc_simple after switching the stack to DRAM. This may be set
187 to give board_init_r() a larger heap then the initial heap in
188 SRAM which is limited to SYS_MALLOC_F_LEN bytes.
190 config SPL_SEPARATE_BSS
192 bool "BSS section is in a different memory region from text"
194 Some platforms need a large BSS region in SPL and can provide this
195 because RAM is already set up. In this case BSS can be moved to RAM.
196 This option should then be enabled so that the correct device tree
197 location is used. Normally we put the device tree at the end of BSS
198 but with this option enabled, it goes at _image_binary_end.
202 depends on SPL && SUPPORT_TPL
205 If you want to build TPL as well as the normal image and SPL, say Y.
208 bool "Support Flattened Image Tree"
210 This option allows to boot the new uImage structrure,
211 Flattened Image Tree. FIT is formally a FDT, which can include
212 images of various types (kernel, FDT blob, ramdisk, etc.)
213 in a single blob. To boot this new uImage structure,
214 pass the address of the blob to the "bootm" command.
215 FIT is very flexible, supporting compression, multiple images,
216 multiple configurations, verification through hashing and also
217 verified boot (secure boot using RSA). This option enables that
221 bool "Support Flattened Image Tree within SPL"
226 bool "Display verbose messages on FIT boot"
230 bool "Enable signature verification of FIT uImages"
235 This option enables signature verification of FIT uImages,
236 using a hash signed and verified using RSA. If
237 CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive
238 hashing is available using hardware, then then RSA library will use
239 it. See doc/uImage.FIT/signature.txt for more details.
241 WARNING: When relying on signed FIT images with a required signature
242 check the legacy image format is disabled by default, so that
243 unsigned images cannot be loaded. If a board needs the legacy image
244 format support in this case, enable it using
245 CONFIG_IMAGE_FORMAT_LEGACY.
247 config SPL_FIT_SIGNATURE
248 bool "Enable signature verification of FIT firmware within SPL"
253 config FIT_BEST_MATCH
254 bool "Select the best match for the kernel device tree"
257 When no configuration is explicitly selected, default to the
258 one whose fdt's compatibility field best matches that of
259 U-Boot itself. A match is considered "best" if it matches the
260 most specific compatibility entry of U-Boot's fdt's root node.
261 The order of entries in the configuration's fdt is ignored.
264 bool "Show verbose messages when FIT images fails"
267 Generally a system will have valid FIT images so debug messages
268 are a waste of code space. If you are debugging your images then
269 you can enable this option to get more verbose information about
272 config OF_BOARD_SETUP
273 bool "Set up board-specific details in device tree before boot"
276 This causes U-Boot to call ft_board_setup() before booting into
277 the Operating System. This function can set up various
278 board-specific information in the device tree for use by the OS.
279 The device tree is then passed to the OS.
281 config OF_SYSTEM_SETUP
282 bool "Set up system-specific details in device tree before boot"
285 This causes U-Boot to call ft_system_setup() before booting into
286 the Operating System. This function can set up various
287 system-specific information in the device tree for use by the OS.
288 The device tree is then passed to the OS.
290 config OF_STDOUT_VIA_ALIAS
291 bool "Update the device-tree stdout alias from U-Boot"
294 This uses U-Boot's serial alias from the aliases node to update
295 the device tree passed to the OS. The "linux,stdout-path" property
296 in the chosen node is set to point to the correct serial node.
297 This option currently references CONFIG_CONS_INDEX, which is
298 incorrect when used with device tree as this option does not
299 exist / should not be used.
301 config SYS_EXTRA_OPTIONS
302 string "Extra Options (DEPRECATED)"
304 The old configuration infrastructure (= mkconfig + boards.cfg)
305 provided the extra options field. If you have something like
306 "HAS_BAR,BAZ=64", the optional options
308 #define CONFIG_BAZ 64
309 will be defined in include/config.h.
310 This option was prepared for the smooth migration from the old
311 configuration to Kconfig. Since this option will be removed sometime,
312 new boards should not use this option.
315 depends on SPARC || ARC || X86 || ARCH_UNIPHIER || ARCH_ZYNQMP || \
316 (M68K && !TARGET_ASTRO_MCF5373L) || MICROBLAZE || MIPS
320 TODO: Move CONFIG_SYS_TEXT_BASE for all the architecture
323 bool "Enable SPL loading U-Boot as a FIT"
326 Normally with the SPL framework a legacy image is generated as part
327 of the build. This contains U-Boot along with information as to
328 where it should be loaded. This option instead enables generation
329 of a FIT (Flat Image Tree) which provides more flexibility. In
330 particular it can handle selecting from multiple device tree
331 and passing the correct one to U-Boot.
333 config SPL_FIT_IMAGE_POST_PROCESS
334 bool "Enable post-processing of FIT artifacts after loading by the SPL"
335 depends on SPL_LOAD_FIT && TI_SECURE_DEVICE
337 Allows doing any sort of manipulation to blobs after they got extracted
338 from the U-Boot FIT image like stripping off headers or modifying the
339 size of the blob, verification, authentication, decryption etc. in a
340 platform or board specific way. In order to use this feature a platform
341 or board-specific implementation of board_fit_image_post_process() must
342 be provided. Also, anything done during this post-processing step would
343 need to be comprehended in how the images were prepared before being
344 injected into the FIT creation (i.e. the blobs would have been pre-
345 processed before being added to the FIT image).
348 depends on ARC || ARCH_SUNXI
349 int "CPU clock frequency"
351 TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture
353 config ARCH_FIXUP_FDT
354 bool "Enable arch_fixup_fdt() call"
355 depends on ARM || MIPS
358 Enable FDT memory map syncup before OS boot. This feature can be
359 used for booting OS with different memory setup where the part of
360 the memory location should be used for different purpose.
362 endmenu # Boot images
364 source "common/Kconfig"
372 source "drivers/Kconfig"
378 source "test/Kconfig"